Unfortunately, the only things I've seen are trivial and IMHO entirely unnecessary changes like "change the icons" or "add more useless whitespace", or something that was already widespread and possible decades ago like "now we have multiple windows". If that's what they thought were "features and improvements", it explains why Teams is still a sluggish pig that just barely works and feels repugnant to interact with.

It still greatly disappoints me that Microsoft of all companies can't write a decent native IM/AV client anymore. This AI stuff is not going to improve the basic experience either.